OK, I'll be first to admit that this is mega-griefing and mean. However..you need those primals and you need them now damnit.
One thing to remember when farming motes and primals are most if not all mobs that drop them are elementals. You, as a warlock have a nice skill called Banish. I needed motes of fire on my Warlock so I went to Skald in Blades Edge...and needless to say I was dishartened by the 6+ ally farmers there. I banished their mobs and 20 minutes later I owned the entire area. 4 Primals per hour when farming alone aint bad.
It's pretty straight forward. you banish what they are attacking and either A.) they get sick of waiting for banishes to wear off and leave, or B.) They attack a different mob. B is fun because then you just banish one of your mobs and now that have 2 aggroed on them...if the first mob was far enough away that when you banish the second they run for a 3rd..all the better. They are now dead.
Another great thing is the Banish links your mobs to theirs. So, if you soulstone and banish one of their mobs...and then run around and aggro 100 things, when you die those mobs kill the enemy. Then you pop your SS, laugh and continue on your way.
There is the possibility of another result, C.) BANNED...I don;t know...I've been doing it for a month and have yet to be banned.
There ya go!